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Routing optimization based switch method in local mobile administrative domain

A mobility management, local technology, applied in the direction of data exchange through path configuration, which can solve the problems of large data transmission delay and inability to immediately realize MN data transmission, etc.

Inactive Publication Date: 2008-05-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, after the MN switches to the target MAG, the uplink data transmission of the MN cannot reach the CN immediately, resulting in a large data transmission delay

Method used

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  • Routing optimization based switch method in local mobile administrative domain
  • Routing optimization based switch method in local mobile administrative domain
  • Routing optimization based switch method in local mobile administrative domain

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0040] In the first embodiment of the present invention, when the original MAG (MAG1) clearly knows the IP information of the target MAG (MAG2), before the MN switches to MAG2, a communication tunnel from MAG2 to the MAG (MAG3) controlling the CN is pre-established, so as to It is guaranteed that when the MN switches to MAG2, the data transmission between the MN and the CN is realized immediately. Such as Figure 5As shown, the specific steps of this embodiment are as follows:

[0041] The data transmission between MN and CN is carried out through the two-way communication tunnel MAG1-MAG3 between MAG1 and MAG3. MAG1 knows that the MN will handover to MAG2, and knows the IP information of MAG2.

[0042] Step 501a, MAG1 sends to MAG2 a MN MovementNocification message (MN MovementNocification) and related information about data transmission between MN and CN, the related information includes: MN-ID, MN-IP, MAG1-IP, MAG3-IP or CN- IP; at the same time,

[0043] In step 501b, ...

no. 2 example

[0058] In the second embodiment of the present invention, when MAG1 does not know the IP information of MAG2, after MN switches to MAG2, MAG2 initiates a tunnel establishment request to MAG1, establishes a communication tunnel MAG2-MAG1, and enables data transmission from MN to CN to pass through The serial tunnel formed by the rapidly established tunnel MAG2-MAG1 and the tunnel MAG1-MAG3 is realized. Then, tunnel MAG2-MAG3 is established again, and tunnel MAG2-MAG1 and tunnel MAG2-MAG3 are dismantled. Such as Figure 6 As shown, the specific steps of this embodiment are as follows:

[0059] The data transmission between MN and CN is carried out through the two-way communication tunnel MAG1-MAG3 between MAG1 and MAG3. MAG1 knows that the MN will be handed over, but does not know the IP information of MAG2.

[0060] Step 601, MAG1 buffers the data sent from CN to MN.

[0061] Step 602, MAG1 sends MN MovementNocification message and related information of data communication ...

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Abstract

The invention provides a method for switching based on route optimization in a local mobile management domain, which is used during switching a mobile node (MN) in the local management domain. The method includes the following steps: when a target MAG detects MN switching is operated, a request for establishing a tunnel is put forward at once to establish a data communication channel between the MN and a source communication node (CN). The method for switching provided by the invention is capable of establishing a data communication channel as soon as possible between the MN and the CN after the MN is switched into a destination MAG, thus decreasing the transmission delay of uplink data in the MN.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a handover method based on route optimization in a local mobility management domain. Background technique [0002] Network-based local mobility management (NETLMM) is the research content of the NETLMM working group in the Internet Engineering Task Force (IETF). The biggest difference between NETLMM and global mobility management (such as mobile IP) is that the mobile node (MN) does not change the IP address during the movement within the local mobility management domain (LMMD), and does not need to obtain a new IP address , Duplicate Address Detection (DAD), registering a new care-of address with the global mobility anchor (such as: Home Agent HA) and other processes, reducing handover delay and air interface signaling; in addition, since the MN does not change the IP address, the node Location privacy is improved over global mobility management. [0003] The NE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28
Inventor 夏斌邹国辉
Owner HUAWEI TECH CO LTD
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